> ## Documentation Index > Fetch the complete documentation index at: https://developer.mailbeast.ai/llms.txt > Use this file to discover all available pages before exploring further. # Current usage for one limit > Just one limit (used/limit/remaining/percentage/isUnlimited) - handy when you only care about the one you’re about to spend. Requires one of the following scopes: `usage:read`, `all:read`, `all:all`. ## OpenAPI ````yaml /openapi.json get /v1/usage/{limitType} openapi: 3.0.0 info: title: MailBeast Public API description: >- Task-shaped REST API for campaigns, leads, deliverability, verification and lead discovery. Authenticate with an API key (`Authorization: Bearer mb_live_…`); the workspace is resolved from the key. version: '1' contact: {} servers: - url: https://api.mailbeast.ai security: [] tags: - name: API Keys description: Create, list and revoke API keys programmatically. - name: Campaigns description: Create, configure, launch and monitor email campaigns. - name: Leads description: Add, read, update and bulk-manage a campaign’s leads. - name: Workspace description: Read usage, subscription and workspace identity. - name: Email Accounts description: >- Connect and manage the sending mailboxes your campaigns send from (SMTP/IMAP or native OAuth). - name: Analytics description: Engagement reporting – per campaign, over time, and across the workspace. - name: Lead Finder description: >- Discover new companies and leads. List past searches and poll a running search’s progress. paths: /v1/usage/{limitType}: get: tags: - Workspace summary: Current usage for one limit description: >- Just one limit (used/limit/remaining/percentage/isUnlimited) - handy when you only care about the one you’re about to spend. Requires one of the following scopes: `usage:read`, `all:read`, `all:all`. operationId: workspace_usageForLimit parameters: - name: limitType required: true in: path description: The limit to read. schema: enum: - monthly_emails - active_contacts - ai_credits - email_validation - monthly_imports - lead_finder_credits type: string responses: '200': description: '' content: application/json: schema: $ref: '#/components/schemas/UsageLimitDto' '400': description: The request body or parameters failed validation. content: application/json: schema: $ref: '#/components/schemas/ApiErrorDto' example: error: type: invalid_request_error code: validation_failed message: One or more fields are invalid. status: 400 requestId: e4f1c0b2-6a3d-4b8e-9f21-0a1b2c3d4e5f details: - name should not be empty '401': description: Missing or invalid API key. content: application/json: schema: $ref: '#/components/schemas/ApiErrorDto' example: error: type: authentication_error code: unauthenticated message: Missing or invalid API key. status: 401 requestId: e4f1c0b2-6a3d-4b8e-9f21-0a1b2c3d4e5f '403': description: >- The key lacks a required scope, or the plan does not include API access. content: application/json: schema: $ref: '#/components/schemas/ApiErrorDto' example: error: type: authorization_error code: permission_denied message: This API key is missing the required scope. status: 403 requestId: e4f1c0b2-6a3d-4b8e-9f21-0a1b2c3d4e5f '429': description: >- Rate limit exceeded - retry after the interval in the Retry-After header. content: application/json: schema: $ref: '#/components/schemas/ApiErrorDto' example: error: type: rate_limit_error code: rate_limited message: >- Too many requests. Retry after the interval in the Retry-After header. status: 429 requestId: e4f1c0b2-6a3d-4b8e-9f21-0a1b2c3d4e5f retryAfter: 30 security: - ApiKey: [] components: schemas: UsageLimitDto: type: object properties: used: type: number example: 1240 description: Units consumed this period. limit: type: number nullable: true example: 5000 description: The cap, or `null` when unlimited. remaining: type: number nullable: true example: 3760 description: Units left, or `null` when unlimited. isUnlimited: type: boolean example: false usagePercentage: type: number example: 24.8 description: used / limit × 100 (0 when unlimited). limitType: type: string enum: - monthly_emails - active_contacts - ai_credits - email_validation - monthly_imports - lead_finder_credits example: monthly_emails required: - used - limit - remaining - isUnlimited - usagePercentage - limitType ApiErrorDto: type: object properties: error: $ref: '#/components/schemas/ApiErrorBodyDto' required: - error ApiErrorBodyDto: type: object properties: type: type: string example: authorization_error description: Broad error class. code: type: string example: permission_denied description: Stable machine-readable code to switch on. message: type: string example: This API key is missing the required scope. status: type: number example: 403 requestId: type: string example: e4f1c0b2-6a3d-4b8e-9f21-0a1b2c3d4e5f description: Correlation id - quote it in support requests. details: description: Field-level validation messages (present on validation errors). example: - name should not be empty type: array items: type: string retryAfter: type: number description: Seconds to wait before retrying (present on 429 responses). example: 30 required: - type - code - message - status - requestId securitySchemes: ApiKey: scheme: bearer bearerFormat: mb_live_… type: http ```` ## Related topics - [Current usage](/api-reference/workspace/current-usage.md) - [Workspace & Usage](/workspace.md) - [Subscription](/api-reference/workspace/subscription.md) - [Workspace identity](/api-reference/workspace/workspace-identity.md) - [Authentication](/authentication.md)